<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    .bx{color:red}
    #xxj_p{color:yellow}
    h1,xxj_p,.bx{background-color: blue}
    input[type='text']{color:hotpink}
    input[type='password']{color:cadetblue}

    *{border:1px solid darkred}
  </style>
</head>
<body>
用户名：<input type="text" name="username" placeholde="请输入用户名">
密码：<input type="password" name="password" placeholder="请输入密码">
<h1>标题</h1>
<p class="bx">冰箱</p>
<p id="xxj_p">洗胡秀明机</p>
<div class="bx">香蕉</div>
<div>苹果肌</div>


</body>
</html>